|
1
17 package org.apache.ws.jaxme.sqls.impl;
18
19 import java.util.ArrayList  ;
20 import java.util.Iterator ;
21 import java.util.List ;
22
23 import org.apache.ws.jaxme.sqls.Column;
24 import org.apache.ws.jaxme.sqls.ColumnSet;
25 import org.apache.ws.jaxme.sqls.ForeignKey;
26 import org.apache.ws.jaxme.sqls.Table;
27
28
29
33 public class ForeignKeyImpl extends ColumnSetImpl implements ForeignKey {
34 public static class ColumnReferenceImpl implements ForeignKey.ColumnLink {
35 private final Column localColumn, referencedColumn;
36 public ColumnReferenceImpl(Column pLocalColumn, Column pReferencedColumn) {
37 if (pLocalColumn == null) {
38 throw new NullPointerException ("The local column must not be null.");
39 }
40 if (pReferencedColumn == null) {
41 throw new NullPointerException ("The referenced column must not be null.");
42 }
43 localColumn = pLocalColumn;
44 referencedColumn = pReferencedColumn;
45 }
46 public Column getLocalColumn() {
47 return localColumn;
48 }
49 public Column getReferencedColumn() {
50 return referencedColumn;
51 }
52 }
53
54 private Table referencedTable;
55 private ForeignKey.Mode onDelete, onUpdate;
56 public List references = new ArrayList ();
57
58 protected ForeignKeyImpl(Table pTable, Table pReferencedTable) {
59 super(pTable);
60 if (pReferencedTable == null) {
61 throw new NullPointerException ("The referenced table must not be null.");
62 }
63 referencedTable = pReferencedTable;
64 }
65
66 public Table getReferencedTable() {
67 return referencedTable;
68 }
69
70 public void setOnDelete(ForeignKey.Mode pMode) {
71 onDelete = pMode;
72 }
73
74 public ForeignKey.Mode getOnDelete() {
75 return onDelete;
76 }
77
78 public void setOnUpdate(ForeignKey.Mode pMode) {
79 onUpdate = pMode;
80 }
81
82 public ForeignKey.Mode getOnUpdate() {
83 return onUpdate;
84 }
85
86 public void addColumnLink(Column pColumn, Column pReferencedColumn) {
87 addColumnReference(new ColumnReferenceImpl(pColumn, pReferencedColumn));
88 }
89
90 public void addColumnReference(ForeignKey.ColumnLink pReference) {
91 Column localColumn = pReference.getLocalColumn();
92 if (!getTable().equals(localColumn.getTable())) {
93 throw new IllegalStateException ("The local column " + localColumn.getQName() +
94 " is not from the local table " + getTable().getQName());
95 }
96 Column referencedColumn = pReference.getReferencedColumn();
97 if (!getReferencedTable().equals(referencedColumn.getTable())) {
98 throw new IllegalStateException ("The referenced column " + referencedColumn.getQName() +
99 " is not from the referenced table " + getReferencedTable().getQName());
100 }
101 references.add(pReference);
102 }
103
104 public void addColumnLink(Column.Name pName, Column.Name pReferencedName) {
105 Column localColumn = getTable().getColumn(pName);
106 if (localColumn == null) {
107 throw new NullPointerException ("The local table " + getTable().getQName() +
108 " doesn't contain a column " + pName);
109 }
110 Column referencedColumn = getReferencedTable().getColumn(pReferencedName);
111 if (referencedColumn == null) {
112 throw new NullPointerException ("The referenced table " + getReferencedTable().getName() +
113 " doesn't contain a column " + pReferencedName);
114 }
115 addColumnLink(localColumn, referencedColumn);
116 }
117
118 public void addColumnLink(String pName, String pReferencedName) {
119 addColumnLink(new ColumnImpl.NameImpl(pName), new ColumnImpl.NameImpl(pReferencedName));
120 }
121
122 public Iterator getColumnLinks() {
123 return references.iterator();
124 }
125
126 public Iterator getColumns() {
127 return new Iterator (){
128 Iterator inner = getColumnLinks();
129 public boolean hasNext() { return inner.hasNext(); }
130 public void remove() { inner.remove(); }
131 public Object next() {
132 ForeignKey.ColumnLink link = (ForeignKey.ColumnLink) inner.next();
133 return link.getLocalColumn();
134 }
135 };
136 }
137
138 public ColumnSet getReferencedColumns() {
139 return new ColumnSet(){
140 public Table getTable() { return getReferencedTable(); }
141 public Iterator getColumns() {
142 return new Iterator () {
143 private Iterator inner = getColumnLinks();
144 public Object next() {
145 return ((ColumnLink) inner.next()).getReferencedColumn();
146 }
147 public boolean hasNext() { return inner.hasNext(); }
148 public void remove() { inner.remove(); }
149 };
150 }
151 };
152 }
153 }
154 |
Popular Tags |
Java API By Example, From Geeks To Geeks.